import AI01weightDecoder from './AI01weightDecoder';
import BitArray from '../../../../common/BitArray';
import NotFoundException from '../../../../NotFoundException';
import StringBuilder from '../../../../util/StringBuilder';

export default class AI013x0x1xDecoder extends AI01weightDecoder {
  private static readonly HEADER_SIZE = 7 + 1;
  private static readonly WEIGHT_SIZE = 20;
  private static readonly DATE_SIZE = 16;

  private readonly dateCode: string;
  private readonly firstAIdigits: string;

  constructor(information: BitArray, firstAIdigits: string, dateCode: string) {
    super(information);
    this.dateCode = dateCode;
    this.firstAIdigits = firstAIdigits;
  }

  public parseInformation(): string {
    if (this.getInformation().getSize() !== AI013x0x1xDecoder.HEADER_SIZE + AI013x0x1xDecoder.GTIN_SIZE + AI013x0x1xDecoder.WEIGHT_SIZE + AI013x0x1xDecoder.DATE_SIZE) {
      throw new NotFoundException();
    }

    let buf = new StringBuilder();

    this.encodeCompressedGtin(buf, AI013x0x1xDecoder.HEADER_SIZE);
    this.encodeCompressedWeight(buf, AI013x0x1xDecoder.HEADER_SIZE + AI013x0x1xDecoder.GTIN_SIZE, AI013x0x1xDecoder.WEIGHT_SIZE);
    this.encodeCompressedDate(buf, AI013x0x1xDecoder.HEADER_SIZE + AI013x0x1xDecoder.GTIN_SIZE + AI013x0x1xDecoder.WEIGHT_SIZE);

    return buf.toString();
  }

  private encodeCompressedDate(buf: StringBuilder, currentPos: number): void {
    let numericDate = this.getGeneralDecoder().extractNumericValueFromBitArray(currentPos, AI013x0x1xDecoder.DATE_SIZE);
    if (numericDate === 38400) {
      return;
    }

    buf.append('(');
    buf.append(this.dateCode);
    buf.append(')');

    let day = numericDate % 32;
    numericDate = Math.trunc(numericDate / 32);
    let month = numericDate % 12 + 1;
    numericDate = Math.trunc(numericDate / 12);
    let year = numericDate;

    if (Math.trunc(year / 10) === 0) {
      buf.append('0');
    }
    buf.append(year.toString());
    if (Math.trunc(month / 10) === 0) {
      buf.append('0');
    }
    buf.append(month.toString());
    if (Math.trunc(day / 10) === 0) {
      buf.append('0');
    }
    buf.append(day.toString());
  }

  protected addWeightCode(buf: StringBuilder, weight: number): void {
    buf.append('(');
    buf.append(this.firstAIdigits);
    buf.append(Math.trunc(weight / 100000).toString());
    buf.append(')');
  }


  protected checkWeight(weight: number): number {
    return weight % 100000;
  }
}
